NAME

SYNOPSIS

DESCRIPTION

Pass a pointer to a linked list of strings with host name resolve
information to use for requests with this handle. The linked list
should be a fully valid list of structcurl_slist structs properly
filled in. Use curl_slist_append(3) to create the list and
curl_slist_free_all(3) to clean up an entire list.
Each single name resolve string should be written using the format
HOST:PORT:ADDRESS[,ADDRESS]... where HOST is the name libcurl will try
to resolve, PORT is the port number of the service where libcurl wants
to connect to the HOST and ADDRESS is one or more numerical IP
addresses. If you specify multiple ip addresses they need to be
separated by comma. If libcurl is built to support IPv6, each of the
ADDRESS entries can of course be either IPv4 or IPv6 style addressing.
This option effectively pre-populates the DNS cache with entries for
the host+port pair so redirects and everything that operations against
the HOST+PORT will instead use your provided ADDRESS. Addresses set
with CURLOPT_RESOLVE(3) will not time-out from the DNS cache like
ordinary entries.
If the DNS cache already have an entry for the given host+port pair,
then this entry will be removed and a new entry will be created. This
is because old entry may have have different addresses or be ordinary
entries with time-outs.
The provided ADDRESS set by this option will be used even if
CURLOPT_IPRESOLVE(3) is set to make libcurl use another IP version.
Remove names from the DNS cache again, to stop providing these fake
resolves, by including a string in the linked list that uses the format
"-HOST:PORT". The host name must be prefixed with a dash, and the host
name and port number must exactly match what was already added
previously.
Support for providing the ADDRESS within [brackets] was added in
7.57.0.
Support for providing multiple IP addresses per entry was added in
7.59.0.